Sources of infection
[医] 传染源
🧩 词语组成解析
n. 输入源；发起者；来源（source的复数）
of
[əv]
prep. 关于;属于…的;由…制成;
aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气];
infection
[in'fekʃən]
n. <医>传染，感染;传染病，染毒物;影响;
🗣️ 情景例句
OK. Do you know when you'll come and visit?
好啊。你知道几时还会再来拜访我们吗？
I'll play it by ear.
我将随兴而定。
As soon as possible!
越快越好！